下肢に発生した巨大グロームス腫瘍の1例

Huge Glomus Tumor of the Lower Limb : Case Report

　抄録：症例は34歳の女性で，右足関節内側に発生した13×14cmの軟部腫瘍を主訴として来院した．X線で石灰化を認め，CT，MRIでは，足関節周囲，膝窩にも多発性に同じ腫瘍病変を認めた．血管造影，²⁰¹Tlスキャンともにすべての腫瘍に集積があった．以上から悪性腫瘍を疑ったが，生検術の結果はグロームス腫瘍であり，摘出術を施行した．グロームス腫瘍は通常1cm以下で爪周囲に多い単発性の腫瘍であるが，本例は巨大で多発性に発生しており，今後も再発についての注意深い経過観察が必要と考えられる．

　A 34-year-old woman was found to have a 13×14cm soft-tissue tumor of the right ankle. Plain radiographs showed a soft-tissue swelling with a calcification shadow in the right ankle. CT and MRI revealed a 13×14cm cystic mass on the medial side of the right ankle and other masses on the lateral side of the ankle and in the popliteal fossa. An angiogram showed hypervascular masses, and a thallium-201 scintigram showed accumulation at the ankle. Incisional biopsy was performed, and the histological diagnosis was glomus tumor with no evidence of malignancy. The tumors were excised. Glomus tumor is a benign soft-tissue tumor and is commonly found as a solitary mass less than 1cm in the subungual region. However, the tumors in our patient were huge and developed at multiple locations, and careful attention should be paid to recurrence.